From the Super Mario Wiki
Jungle Rumble (also called Floor 4, listed as Floor 3 in the PAL version) is the fourth floor in Mario vs. Donkey Kong: Minis March Again!. It is a counterpart to Jungle Hijinks in Mario vs. Donkey Kong 2: March of the Minis. Enemies introduced in this world are Snifits, appearing alongside Shy Guys, Capture Kongs and Circus Kongs. In the Plus version, Conveyor Belts, Pokeys, and Thwomps are added. Color Switches and Hammers are the only objects utilised here.
The background consists of a dense palm tree jungle over a blue sky painted on a wall. The music is the same as Jungle Hijinks from Mario vs. Donkey Kong 2: March of the Minis, which is a rendition of the "DK Island Swing" track from Donkey Kong Country.